python:
 * revise makefile: most modules can now be included/excluded without rebuilding python
 * add "include .py-files only"-mode
 * make expat module mandatory (it seems there is no tidy way to separate it)
 * add wsgiref module
 * other minor cleanups
 * refs #1839


git-svn-id: file:///var/svn/freetz/trunk@10062 149334a1-2f27-0410-a3b9-fc62619ac1e6